Lock washer with keys



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LOCK WASHER WITH KEYS Filed Aug. 6, 1930 washers,

means adapts ing drawing, wherein- Patented July 4, 1933 UNITED STATES PATENT OFFICE CARL G. OLSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO SHAKEPROOF LOCK WASHER COMPANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF DELAWARE LOCK WASHER WITH KEYS Application filed August 6, 1930. Serial No. 473,328.

My invention" relates generally to lock and more particularly to lock washers which are adapted to be secured against rotation within a work piece.

It is in some instances desirable, in employing lock washers, as, for example, lock washers of the type having a plurality of prongs associated with an annular body portion, to provide means for oppositely securing the washer against rotation with respect to the work piece.

It is one of the primary objects of my present invention to provide a lock washer of the above mentioned type, which is pro? vided with means, in addition to the locking teeth, which is adapted to cooperate with the work piece with which the washer is associated, to secure said washer against rotation. I

More specifically, it is an object of my invention to provide in combination with a lock washer, means extendin the plane of said washer which is adapted to interlock with the work piece, and thereby counteract any tendency for the washer to rotate with respect to the work piece when a member, such as a nut, is rotatively clam ,d thereagainst.

A urther object of my invention is to provide a lock washer as above set forth, in which a portion of the flected out of the in position to be received by an aperture provided in the work with which the washer is associated. p

In addition to the washer construction per my invention contemplates the provision of a new and improved combination with a work piece provided with. an aperture and a lock washer ositioned adjacent thereto, of

d to be received by the aperture in the work thereto.

vantages will be more a parent from the following detailedv description when considered In connection with the accompany- Figure 1 is an elevational, view of a lock laterally of closing the lock washer stock thereof is dea, plane of the washer body piece for securin the lock washer against displacement with respect washer constructed in accordance with the teachings of my present invention and prov ded with apertures for receiving a locking P Figure 2 is an elevational view of a lock washer of modified construction, in which a section of the lock washer, which is disposed laterally thereof, serves ment; 1

Figure 3 is still a further modification, d sclosing a lock washer which is equipped with means for interlocking with the work piece, and means for interlocking with a keyway of a screw for securing the lock washer against displacement;

Figure 4 is an enlarged fragmentary transverse sectional view taken substantially along the line 4-4 of Figure 3;

igure 5 is an enlarged fragmentar sectionzl view taken along the line 5-5 0 Figure Figure 6 is a transverse sectional view taken substantially along the line 6-6 of Figure 1;

Figure 7 is a fragmentary view disclosing' a lock washer of the type shown in Figure '1, operati-vely associated with the work;

Figure 8 is ,a view similar to Figure 7 disof Figure 3, operatively associated with the work; and

Figure 9 discloses the lock washer of Figure 2 in operative association with the work. Referring now to the drawing more in detail, wherein like numerals have been employed to designate similar parts throughout the various figures, it will be noted that in Figure l I have disclosed a lock washer designated generally by the numeral 10, which includes a body 'portion 12 and aplurality of internal marginal teeth '14, which are twisted out of the plane of the washer body.

as a locking eleso as to provide locking elements on opposite sides of the washer. The structural arrangement of theseteeth 14 does not form a part "of the'present invention, except in so far as said teeth enter into the general combination. In other words, my invention is not limited to alock washer having a specific type of locking tooth,'b.ut for purposes of I m The work the associated parts, including illustration I have disclosed a lock washer of the twisted tooth type.

At diametrically opposite positions along the internal margln of the washer I provide sections 16, and these sections are each formed withana ure 18. Thisaperture18eooperates with a pin 20, Figure 7, in securin the washer 10 against'rotation upon a wor piece 22.

S'ece 22 is apertured to receive the pin 20 an the portion of said pin which pro ects above the surface ofthe work piece is received by the aperture 18 in the washer. When the washer 10 is operatively associated u with a threaded 'member or screw 24 and the work piece 22 as shown in Figure 7, and a nut 26 is clam d a inst the washer, it will be apparent at t e corners of the pro s -14 which roject above the plane of e washer loc ly engage the adjacent surface of the nut so as to secure said nut against unscrewing. The lower corners of the teeth 14 are adapted to imbed themselves within the work piece 22 and thus cooperate u with the oppositely disposed corners in securing the nut agalnst unscrewing. The pin 20 serves as a positive means for locking the washer against relative rotation with respect to the work piece 22. I

,5 Referring to Figure 2, it will be seen um I disclose a lock washer d f ated generally by the numeral 10, which is also provided with a plurality of teeth or prongs 14,- A marginal section 16'- of the washer 10 which as corresponds to the section 16 of the washer shown in Figural, is formed with a laterally extending lockinqi'section or key 28, Figures 2, and ee28 is adapted to extend partially within a yway 30 provided ina threaded member 'or screw 24 and partially within a groove I work iece' 22%. key 28 is sinuously to so as .to aflord suflicientthickness. Thusit will be seenin Figure 9 that when the washer-' is applied to the work piece. 22and aserewwandthenut 26is clamped thereagaritst, the sinuous key 28 serveaas a positive meansjforsecuring the lock washer against relative rotation with to the screw and thework piece, and for securing the screw relative rotation wlth respect to the'work piece. This construction is I stances where it is desirable to have all of v the screw, work piece, washer and nut; as a A still further modification is in Fi 3, 4, and 8, wherein I have shown a ock washer designated generally bythe numeral 10", said lock washer being provided with a plurality of internal marginal range 14. It be observed that the w er 10" is provided with a marginal section 16' whichcorresponds in character- 22 which is formed in the pa "ly, appliable in inistics to the sections 16 and 16" shown in' Figures land 2 respectively, and extending inwardly from the section 16 is a key member 28. This key. member corresponds to the key 28 shown in Figure 9, but differs from the key 28 in that it only secures the lock washer 10 against rotation with respect to the screw.

However, in order to secure the lock washer 10 against rotation with respect to the work piece'22 I provide a locking member or section This member 20 corresponds in functional characteristics to the pin 20 same result by the use of a single element,-

namely the ke 28.

From the oregoing itwill be-apparent that my invention contemplates the provision of a lock washer provlded with means whereby said washer may be eflectively and positively secured against relative rotation with res t to both the screw and the work piece. y invention is particularly applicable in instances'whereit is desirable to apply alock washer to a part having a hardened surface. Thus if the work piece 22, 229 or 22 were considered as hardened steel'parte provided with apertures for receivingeither the locking pin 2 I key 28, it will'be apsplarent that while the teeth of the lock w er adjacent the sur-' face of the wgrk piece might not imbed them-,

selves said: surface, the locking elements justireietmd to would serve to pre-v vent rotation'between the washer and" the; work piece and the teeth on the op 'te side of the washer would serve to lin ii y engage the softer material of the nut; twill thus be apparent that my invention is adaptable for a wide range of uses, and in view of its simple construction, it is adapted'to be formed or blanked from asingle sheet of flat stock.- 4 A parting fromthe spirit and scope thereof.

pect to the screw and work piece 20, the element-20-'or the While I have described a lock washer oi a particular twisted tooth type and have; shown certain forms of keyways and the it be apparent that the invention isc'a ble of many other mbdifications without Having thus described my invention,'what I claim as new and dedre to secure by Intters Patent is:

1. The combination er work piece me a threaded member extendilfi theregliwrougchii mom e said work piece and thread having a recess formed therein, a lock washer including abody portion, locking teeth extending out of the plane of the body portion, and a locking element extending from said lock washer into the recesses in said work piece and threaded member whereby all of said parts are secured against relative rotation.

2. A lock washer of the class described including an annular body portion, locking teeth extending out of the plane thereof, and a single locking element extending out of the plane of the washer which is adapted to interlock with a work piece and screw for scribed my name.

CARL G. OLSON. 

